The original and still the best! Cosmos ‘Purity’ towers over the garden giving you armloads of pure white blooms, more flower than any other variety I have grown.
No cutting garden would be complete without a patch of Cosmos! With long strong stems and abundant romantic blooms, its cut and come again. Regular harvesting will keep your plants producing bucketful’s of blooms through the season.
Perfect for garden decoration too, delicate blooms dance in the breeze attracting bees and butterflies.
With so many varieties available it can be hard to choose. Cosmos ‘Purity’ is among my current top choices and the ones I will be including in my cut flower garden this year.
How to grow:
Don’t start Cosmos too early, these half hardy plants cannot be planted until all risk of frost has passed. Sow under cover in mid spring Ideally, in a glasshouse (or failing this, a well-lit windowsill), spacing plants so that their leaves never touch to avoid legginess.
Plants will be ready for planting into their final positions once the plant begins to bud. The stress of being grown in the confines of a pot promotes flowers earlier than in less stressful positions, such as growing in the ground and should prevent the common occurrence of Cosmos Trees (i.e. massive plants with thick green growth and a complete absence of blooms) For more detailed growing instructions join our ‘Grow Along’ on Instagram
Variety: Cosmos bipinnatus
Type: Half Hardy Annual
Position: Full sun
Germination: Up to 30 days
Pinching: Pinch to encourage branching and more usable stems
Harvest: June onwards (90 days to maturity)
Seeds per packet: 100 (Approx. counted by weight)
Cutting /Vase Life:
Pick as soon as the flowers start to open, straight into ready buckets of water. We rest our stems for a few hours in water, this is called conditioning. Cosmos will continue to open and grow in the vase giving arrangements that magical feel.